for letter in "Python":
    print(letter)

fruits = ['banana', 'apple', 'mango']
for index in range(len(fruits)):
    print('当前水果 : %s' % fruits[index])

print("Good bye!")
print(len(fruits))
print(range(len(fruits)))

for idx in range(2):
    print(f"第{idx + 1}个值: {idx}")
